FROG DISSECTION
• Purpose:
The purpose of this lab activity is to help you learn the anatomy of a frog
and give you a better understanding of the anatomy of vertebrate animals
in general, including humans.
• After completing this dissection, you should be able to:
1.)Correctly identify the locations involved in the dissection procedures,
and
2.)Correctly identify the locations of the major organs within the body
cavity of a frog.
• Materials:
Preserved frog
Dissection Pan
Dissection kit
Scalpel
Forceps
Scissors
Dissecting Pins
Probes
Introduction:
In this lab we will be dissecting a frog to study
the frog’s internal organs to develop
dissection technique and to observe organ
systems of a representative vertebrate. Frogs
are interesting because they live both in and
out of water. They also play a big part in
ecosystem evaluation. Since their skin is so
moist and they absorb things, they have the
ability to absorb nutrients from their
environments.
Introduction, cont’d
This seems like an advantage, but it also lets
them absorb toxins that makes them a miner’s
canary for changes in the environment. Frog’s
are also the first vertebrates we will be
dissecting, and I anticipate that they will be
more interesting than the starfish and clams
since they have more developed internal
systems like nervous, digestive and respiratory
systems. They are also the first dissection
subject we’ve had with a brain.
Nictitating membrane
image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.htm
NO CLAWS
image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
What sex is it?
Images from:
http://sps.k12.ar.us/massengale/frog_dissection.htm
Imagse from:
http://www.animationlibrary.com
http://www.geocities.com/animalbio/biology.htm
TONGUE attached at front not back like yours!
Muscular
Back of throat
Pulls food into
digestive syste
image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
Connect ears
to back of throat
image from: http://www.spc.cc.tx.us/biology/jmckinney/Studyimages/frog/frogdissectlist.html
GLOTTIS
Opening to
respiratory
GULLET
Opening to
Images from:
http://sps.k12.ar.us/massengale/frog_dissection.htm
Image from; http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20
Laboratory/frog%20dissection/frog%20dissection_files/frame.htm
Image from:
http://step.sdsc.edu/projects95/Frog.Dissection/index.html
Image from; http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20
Laboratory/frog%20dissection/frog%20dissection_files/frame.htm
Females may have black & white eggs
SPLEEN
Produces and stores new RBC’s and processes old worn
out ones
image from:
http://www.manheimcentral.org/~tw005690/Frog/frog.htm
Mesentery holds intestines together
KIDNEYS- Remove nitrogen waste from blood
and dilute it with water to make urine;
osmoregulation
Image from:
http://step.sdsc.edu/projects95/Frog.Dissection/index.html
TESTES
MAKE SPERM
http://step.sdsc.edu/projects95/Frog.Dissection/index.html
TESTES
KIDNEY
BRAIN
http://www.manheimcentral.org/~tw005690/Frog/frog.htm